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to you under the Apache License, Version 2.0 (the
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with the License.  You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
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<html>
    <head>
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width, initial-scale=1" />
        <script src="lib/simpleRequire.js"></script>
        <script src="lib/config.js"></script>
        <script src="lib/jquery.min.js"></script>
        <script src="lib/facePrint.js"></script>
    </head>
    <body>
        <style>
            html, body, #main {
                width: 100%;
                height: 100%;
                margin: 0;
            }

            #snapshot {
                position: fixed;
                right: 10;
                bottom: 10;
                width: 200;
                height: 200;
                background: #fff;
                border: 5px solid rgba(0,0,0,0.5);
            }
        </style>
        <div id="main"></div>
        <img id="snapshot"/>
        <textarea id="xx"></textarea>

        <script>

            var chunkMax = 4;
            var chunkCount = 0;

            function genData1(len, offset) {
                // console.profile('gen');
                var lngRange = [-10.781327, 131.48];
                var latRange = [18.252847, 52.33];

                var arr = new Float32Array(len * 2);
                var off = 0;

                // var data = [];
                for (var i = 0; i < len; i++) {
                    var x = +Math.random() * 10;
                    var y = +Math.sin(x) - x * (len % 2 ? 0.1 : -0.1) * Math.random() + (offset || 0) / 10;
                    arr[off++] = x;
                    arr[off++] = y;
                    // data.push([
                    //     x,
                    //     y
                    // ]);
                }
                // console.profileEnd('gen');
                return arr;
                // return data;
            }

            function genData2(count) {
                var lngRange = [-10.781327, 31.48];
                var latRange = [-18.252847, 30.33];
                return genData(count, lngRange, latRange);
            }

            function genData(count, lngRange, latRange) {
                lngRange[1] += 5;
                lngRange[0] -= 10;
                latRange[1] += 4;
                var lngExtent = lngRange[1] - lngRange[0];
                var latExtent = latRange[1] - latRange[0];
                var data = [];
                for (var i = 0; i < count; i++) {
                    data.push([
                        Math.random() * lngExtent + lngRange[0],
                        Math.random() * latExtent + latRange[0],
                        Math.random() * 1000
                    ]);
                }
                return data;
            }

// var data = genData1(5e5);
// var t = document.getElementById('xx');
// t.innerHTML = data;

            require([
                'echarts'
            ], function (echarts) {
                var chart = echarts.init(document.getElementById('main'));

                chart.setOption({
                    tooltip: {},
                    toolbox: {
                        left: 'center',
                        feature: {
                            dataZoom: {}
                        }
                    },
                    legend: {
                        orient: 'vertical',
                        left: 'left',
                        data: ['pm2.5' /* ,'pm10' */]
                    },
                    // ???
                    // visualMap: {
                    //     min: 0,
                    //     max: 1500,
                    //     left: 'left',
                    //     top: 'bottom',
                    //     text: ['High','Low'],
                    //     seriesIndex: [1, 2, 3],
                    //     inRange: {
                    //         color: ['#006edd', '#e0ffff']
                    //     },
                    //     calculable : true
                    // },
                    grid: {
                        right: '20%',
                        left: '20%'
                    },
                    xAxis: [{
                    }],
                    yAxis: [{
                        max: 0,
                        min: -0.7
                    }],
                    dataZoom: [{
                        type: 'inside',
                        startValue: 5.214,
                        endValue: 6.13
                    }, {
                        type: 'slider',
                        startValue: 5.214,
                        endValue: 6.13
                    }],
                    animation: false,
                    series : [{
                        name: 'pm2.5',
                        type: 'scatter',
                        data: genData1(1e5),
                        dimensions: ['x', 'y'],
                        // symbol: 'rect',
                        symbolSize: 3,
                        // symbol: 'rect',
                        itemStyle: {
                            color: '#128de3',
                            opacity: 0.4
                        },
                        large: true,
                        // large: {
                        //     symbolSize: 2
                        // },
                        // large: function (params) {
                        //     if (params.dataCount > 30000) {
                        //         return {symbolSize: 1};
                        //     }
                        //     else if (params.dataCount > 3000) {
                        //         return {symbolSize: 5};
                        //     }
                        // },
                        largeThreshold: 500,
                        progressive: 500
                    // }, {
                    //     name: 'pm10',
                    //     type: 'scatter',
                    //     data: genData2(2001),
                    //     xAxisIndex: 0,
                    //     yAxisIndex: 0,
                    //     symbolSize: 2,
                    //     // symbol: 'rect',
                    //     itemStyle: {
                    //         normal: {
                    //             borderWidth: 0.5,
                    //             borderColor: '#e01',
                    //             color: '#128de3'
                    //         }
                    //     },
                    //     progressive: 3000
                    }]
                });

                chart.on('click', function (param) {
                    alert('asdf');
                });

                chart.on('finished', function () {
                    // console.log('Render finished');
                    var url = chart.getDataURL();
                    var snapshotEl = document.getElementById('snapshot');
                    snapshotEl.src = url;
                });

                window.onresize = chart.resize;

                // next();

                function next() {
                    if (chunkCount++ < chunkMax) {
                        var newData = genData1(100000, chunkCount);
                        chart.appendData({seriesIndex: 0, data: newData});
                        // console.log('Data loaded');
                        setTimeout(next, 3000);
                    }
                }

            });

        </script>
    </body>
</html>